Hi Im 16 And I Have Had Acne Since I

Hi im 16 and I have had acne since I was 11 at first I had it because I was going through puberty but it only got worse and now I would say my acne is moderate to severe( but closer to moderate). Im out of puberty now and my acne has become one of my main focuses, I also have some acne scarring. Basically I want to know what a dermatologist would do to help my specific acne and how much it would cost without insurance?